144431261 has 4 divisors (see below), whose sum is σ = 155541372. Its totient is φ = 133321152.

The previous prime is 144431257. The next prime is 144431279. The reversal of 144431261 is 162134441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65772100 + 78659161 = 8110^2 + 8869^2 .

It is a cyclic number.

It is not a de Polignac number, because 144431261 - 2² = 144431257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144431261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144731261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555036 + ... + 5555061.

It is an arithmetic number, because the mean of its divisors is an integer number (38885343).

Almost surely, 2^144431261 is an apocalyptic number.

It is an amenable number.

144431261 is a deficient number, since it is larger than the sum of its proper divisors (11110111).

144431261 is a wasteful number, since it uses less digits than its factorization.

144431261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110110.

The product of its digits is 2304, while the sum is 26.

The square root of 144431261 is about 12017.9557745900. The cubic root of 144431261 is about 524.6710089982.

The spelling of 144431261 in words is "one hundred forty-four million, four hundred thirty-one thousand, two hundred sixty-one".